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virgl/vtest: add utilities for receiving fds 

v2: recieve --> receive (airlied@)

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-By: Gert Wollny <gert.wollny@collabora.com>
Reviewed-By: Piotr Rak <p.rak@samsung.com>
This commit is contained in:
Gurchetan Singh 2018-12-11 17:01:34 -08:00
parent 0dd661777a
commit 9881733e32
1 changed files with 43 additions and 0 deletions
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43
src/gallium/winsys/virgl/vtest/virgl_vtest_socket.c
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@ -72,6 +72,49 @@ static int virgl_block_read(int fd, void *buf, int size)
return size;
}
static int virgl_vtest_receive_fd(int socket_fd)
{
struct cmsghdr *cmsgh;
struct msghdr msgh = { 0 };
char buf[CMSG_SPACE(sizeof(int))], c;
struct iovec iovec;
iovec.iov_base = &c;
iovec.iov_len = sizeof(char);
msgh.msg_name = NULL;
msgh.msg_namelen = 0;
msgh.msg_iov = &iovec;
msgh.msg_iovlen = 1;
msgh.msg_control = buf;
msgh.msg_controllen = sizeof(buf);
msgh.msg_flags = 0;
int size = recvmsg(socket_fd, &msgh, 0);
if (size < 0) {
fprintf(stderr, "Failed with %s\n", strerror(errno));
return -1;
}
cmsgh = CMSG_FIRSTHDR(&msgh);
if (!cmsgh) {
fprintf(stderr, "No headers available\n");
return -1;
}
if (cmsgh->cmsg_level != SOL_SOCKET) {
fprintf(stderr, "invalid cmsg_level %d\n", cmsgh->cmsg_level);
return -1;
}
if (cmsgh->cmsg_type != SCM_RIGHTS) {
fprintf(stderr, "invalid cmsg_type %d\n", cmsgh->cmsg_type);
return -1;
}
return *((int *) CMSG_DATA(cmsgh));
}
static int virgl_vtest_send_init(struct virgl_vtest_winsys *vws)
{
uint32_t buf[VTEST_HDR_SIZE];